package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.EmployeeUpdatePasswordDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对

        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     *  修改密码
     * @param employeeUpdatePasswordDTO
     */
    @Override
    public void updatePassword(EmployeeUpdatePasswordDTO employeeUpdatePasswordDTO) {
        //获取当前登录用户id
        Long  id = BaseContext.getCurrentId();

        //根据员工id查询员工数据
        Employee employee = employeeMapper.getById(id);

        //对比原密码
        String oldPassword = DigestUtils.md5DigestAsHex(employeeUpdatePasswordDTO.getOldPassword().getBytes());
        if (!oldPassword.equals(employee.getPassword())){
            //原密码错误
            throw new PasswordErrorException(MessageConstant.OLD_PASSWORD_ERROR);
        }

        //原密码正确，设置新密码
        String newPassword = DigestUtils.md5DigestAsHex(employeeUpdatePasswordDTO.getNewPassword().getBytes());
        employee.setPassword(newPassword);

        //更新数据
        employeeMapper.update(employee);
    }

    /**
     *  新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //获取当前登录用户id
        Long  id = BaseContext.getCurrentId();

        //补全基础字段
        Employee employee = Employee.builder()
                .status(StatusConstant.ENABLE)
                .password(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()))
                .build();
        BeanUtils.copyProperties(employeeDTO,employee);

        //保存数据
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        //执行查询
        List<Employee> employeeList = employeeMapper.page(employeePageQueryDTO.getName());

        //封装结果并返回
        Page<Employee> employeePage = (Page<Employee>) employeeList;
        return new PageResult(employeePage.getTotal(),employeePage.getResult());
    }

    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }

    /**
     *  修改员工
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //更新基础字段
        Employee employee = Employee.builder().build();
        BeanUtils.copyProperties(employeeDTO,employee);

        employeeMapper.update(employee);
    }

    /**
     *  启用禁用员工
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //补全基础字段
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();

        employeeMapper.update(employee);

    }

}
